Well-drilling machine.



PATENTED FEB. 11, 1908'.

L. K. ROBBINS; WELL DRILLING MACHINE.

APPLICATION FILED NOVLEI, 1907.

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PATE-111.11111 1113.11, 1908. L. K. ROBBINS, WELL DRILLING MAGHINEI APPLICATION FILED NOV.9, 19071 2 SHEETS-SHEET 2.

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LEROY K. ROBBINS, OF ST. LOUIS, MISSOURI.

.WELL-DRILLING MACHINE,

Specification of Letters Patent.

Patented Feb. 1 1, 190e.

Application liled November 9. 1907. Serial 110.401.391.

To all whom it 'may concern:

Be it known that LLEROY K. RoBBrNs, a citizen of the United States of America, residing at the city of St. Louis,in the State of Missouri, have invented certain new and useful Improvements in Well-Drilling Machines, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming part of this specification.

My invention relates to `an improvement in well drilling machines and it has for its lobject to provide in a machine of this character a hollow metallic samson post whereby the post contains rigidity and strength to avoid springing or lost motion with a minimum of weight and which is not subject to decay owing to exposure to the elements, the latter being-an important item in well drilling machines owing to the ordinary treatment ot' such machines. n

The invention. further has for its obj ect `to provide a samson post head composed of a single piece of metal having a sleeve fitted to the post and also provided with gudgeon bearings to receive the gudgeons on which the walking beam of the machine turns, thereby avoiding loose joints `between the post head and the post and between the gudgeon bearings and the post head.

The invention further has for its object'to provide the post head with brace lugs formed integral therewith for the reception of the samson post braces in order that no loose joints may .exist between the parts that receive said braces andthe postV head.

Figure 1 is a view partly in vertical longitudinal section and partly in elevation of one end of a drilling machine and illustrating my improvements. Fig. II is an elevation ot the upper end of the samson post, its head and the braces connected to said head,the walking beam being shown in cross section. Fig. III is an inverted plan view of the samson post head with the post shown in cross section taken on line III-III, Fig. II and the braces shown in said figure omitted. Fig. IV is an enlarged side elevation ofthe upper end of the Samson post and its head with the walking beam shown in longitudinal section. Fig. Vis a vertical section taken on line V-V, Fig. IV.

1 designates the frame of the running gear of a well drilling machine that is supported as usual by ground wheels.

2 is a band wheel that is supported by a shaft 3 mounted in suitable journal bearings on the running gear frame and provided with a crank arm 4.

,5 is a pitman connected at one end to the `crank arm 4 and the other end of which is connected to a walking beam 6. The parts thus far described may be of any desirable construction, such as that shown and described in Letters Patent of the United States issued to me October 30, 1906 No. 834,642 and no invention per se is herein claimed for them.

7 designates a Samson post that is made of metal and is hollow throughout its extent, thereby providing a post with the requisite strength and durability with a minimum of weight. The post is supported by the running Crear of the machine and is preferably tiltabl)T mounted thereupon in order that it may be tilted as indicated in dotted lines Fig. I, for which tilting action the post is supported and controlled by a jack rod 8 and sultable jack rod moving means such-as a throw rod 9.

10 designates a head mounted upon the Samson post and which is provided with a sleeve 11 that is adaptedto be shrunk onto the post or secured thereto in any other suitable manner. At the interior of the head 10 and at the upper end of its sleeve is a rib 12 that rests upon the upper end of the samson post and prevents downward movement of the head upon the post after the sleeve of th'e head has been `properly positioned. The head 10 is provided with gudgeon bearing posts 13 that are formed integral with the head and are adapted to receive the gudgeons oi a saddle 14 that is attached to the walking beam 6. The gudgeon bearing posts bein integral lwith the post head 10 are perfect y rigidand a strong substantial structure for the support of the walking beam is provided without the existence ot any connecting parts between the post head and the bearings Jfor the gudgeons. At the lower end of the sleeve ot the post head is a pair of bifurcated brace lugs 11 that are integral with the sleeve and which receive the side braces 15 that connect the post head to the running gear of the machine. At the rear ofthe sleeve of the post head andl integral therewith is a biturcated jack rod lug 11a which receives the upper end of the jack rod 8 that serves as a support and tilting member for the samson post.

I claim:

1. In a Well drilling machine, the combination of a running gear, a Samson post mounted upon said runnin gear, a head fitted to the upper end of sai post and having integral therewith gudgeon bearing posts, and a Walking beam j ournaled to said gudgeon bearing posts, substantially as set forth.

2. In a Well drilling machine, the combination of a running gear, a post mounted upon said running gear, a head having a sleeve fitted to said post and provided with brace lugs formed integral therewith, braces connected to said lugs securin said head to said run-y ning gear, and a Wal ring beam supported by said head, substantially as set forth.

3. In a Well drilling machine, the combination of a running gear, a Samson post mounted upon said running gear, a head having a sleeve fitted to the upper end of said post and provided internally with a rib arranged to rest upon the upper end of said post, and a Walkin beam supported by said head, substantia ly as set forth.

LEROY K. ROBBINS.

In presence of- BLANCHE HOGAN, LILY Pos'r. 

